Whether coevolutionary models of host-pathogen interactions apply to a generalist pathogen that exhibits quantitative virulence across a broad range of plants is an important question. The paper reports interesting data and is framed around an evolutionary message. They draw strong conclusions about how the Botrytis pathosytem drastically differs from classic arms-race evolutionary models of plant-pathogen interactions. Although, I wouldn’t be surprised that this fascinating and still poorly understood generalist fungus would display unique features, I’m not convinced that the evolutionary conclusions are justified based on the described experiments.